Geoengineering Info Profile picture
Apr 29, 2023 7 tweets 6 min read Read on X
🚨PAPER🚨

#DAC of CO2 from the atm. is being explored as a tech. that can contribute to the goal of reaching #NetZero CO2 emissions.

A new study led by @DonglongFu1 showed that the use of zeolitic materials are feasible for DAC when it is integrated with H2O harvesting.
🧵
1/7 Image
"A combination of a commercially available desiccant, AQSOA-Z02A, and a mordenite-type zeolite (MOR) enables
continuous operation of a designed #DAC system comprised of two
parallel units with a regeneration temperature of 100°C," research finds.
2/7 Image
Furthermore, "the system
using pure #zeolite alone requires regeneration at temperatures between 200°C and 300°C."
3/7 ImageImage
"Techno-economic analyses of 12 process
scenarios reveal that the energy requirement of the best scenario
investigated is 71 GJ/tCO2, while the conventional pure zeolitebased system requires 200 GJ/tCO2."
#DAC
4/7 Image
Research declared that, "the optimized system gives a
cost between $246 and $568 per ton CO2 #captured, depending on
the energy costs, while system operates at sub-0°C temperatures or with
integration of water harvesting, respectively."
#DAC
5/7 ImageImage
📖 Read open-access study performed by @DonglongFu1 & Mark Devis funded by @Caltech entitled: "Toward the feasible direct air capture of
carbon dioxide with molecular sieves by water
management," here ⬇️
cell.com/cell-reports-p…

#DirectAirCapture
#CarbonDioxideRemoval

6/7

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More from @geoengineering1

Jun 1
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May 29
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DETAILS🧵1/10
2/ Climate models suggest global temperatures could rise by 7K by 2100, driven by greenhouse gas emissions.

This study asks: what if, instead of changing the atmosphere, we changed our position in space?
Specifically: increase Earth’s orbital radius.
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These cycles show that even slight orbital changes can dramatically affect climate. Image
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May 28
🚨What’s ahead in #SolarGeoengineering?🚨

From research proposal deadlines to online events, in-person conferences, and job alerts — our SRM Events Calendar is packed with all key updates.

🔗:

Here’s what’s coming up in the SRM field:🧵1/13 teamup.com/ks64mmvtit583e…Image
CALL FOR RESEARCH PRESENTATION PROPOSAL—RFF and the Harvard Solar Geoengineering Research Program invite individuals to present research at their upcoming workshop

🗓Deadline: 30 May 2025
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2/13rff.org/events/confere…
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3/13sites.google.com/view/solargeo-…
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May 27
🚨🗓Carbon Removal Events Calendar by Andrew Lockley!🗓🚨

Here's a list of what's coming up this week (27 May - 03 June 2025) in the field of #CarbonDioxideRemoval:

🔗:

🧵1/15 teamup.com/kshqbfhrqkw36s…Image
EVENT—This is CDR: Avnos' Water-Positive, Hybrid Direct Air Capture with Will Kain by @openaircollect

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May 25
📝💡𝐖𝐞𝐞𝐤𝐥𝐲 𝐂𝐃𝐑 𝐇𝐢𝐠𝐡𝐥𝐢𝐠𝐡𝐭𝐬💡📝

📰 Here's your round-up of top #CarbonDioxideRemoval News / Developments from this week (19 May - 25 May 2025):

🔗:

🧵0/24
@AltCarbonIndia secured $12 million in seed funding to scale its enhanced rock weathering operations in South Asia.

1/24
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Read 27 tweets
May 23
🚨Can a single particle both reflect sunlight and capture CO₂—offering a two-in-one tool for climate intervention?🚨

In a new study [preprint], researchers tested the idea with zeolite aerosols. Here's what they found:🧵1/6

#SolarGeoengineering #CDR #ClimateTech Image
The concept: Inject aerosols into the stratosphere that not only reflect sunlight (like standard #SAI) but also adsorb CO₂ from the air.

Zeolites, known for their CO₂-trapping ability, seemed like a candidate for this dual function. Image
But stratospheric conditions are harsh:

•~0.05 atm pressure

•Very low temperatures

Under these conditions, zeolites lose over 99.97% of their CO₂ adsorption capacity compared to ground-based DAC, finds the study. Image
Read 7 tweets

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